Table 2.

Differences between ¹³C NMR and ³¹P NMR chemical shifts for the ligands in the Asp/CMP system in relation to the free ligands [ppm].

	Asp				CMP
pH	C(1)	C(2)	C(3)	C(4)	C(2)	C(4)	C(5)	C(6)	C(5′)	P
3.0	0.049	0.025	0.022	0.002	0.982	0.760	0.057	0.048	0.044	0.018
4.2	0.000	0.013	0.070	0.054	0.861	0.661	0.040	0.047	0.060	0.025
5.5	0.053	0.047	0.027	0.040	0.440	0.593	0.068	0.054	0.099	0.040
8.0	0.454	1.048	0.227	1.322	0.191	0.198	0.068	0.064	0.111	0.105